The shrinking dollar bill
The shrinking dollar bill
复制标题
不断缩水的美元钞票
DOI：
--
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
C. Hermann
中科院分区：
文献类型：
--
作者：
C. Hermann
每个人都知道美元的价值每年都在下降，但实际上有一种方法可以证明美元的缩水。这个演示也可以用任何其他用纸做的东西来做，比如外币、停车罚单、老板的备忘录或信纸。注意：整个演示必须在一个遮光罩里完成。佩戴护目镜、防护手套和防护服。在通风橱中，用氨罐中的液氨将大杜瓦瓶或烧杯装满一半。（氢氧化铵溶液不起作用。）将一美元钞票在氨水中浸泡几秒钟;然后，用钳子取出钞票，让氨水在通风橱中蒸发。随着氨的蒸发，美钞会缩水。这个过程可以重复几次，以缩小法案甚至更多。为了获得一张没有褶皱的美元钞票，将湿钞票放在两个金属块之间，用热风枪加热块，直到钞票干燥。我们在这个过程之前和之后称量了美元钞票的重量，然后将它们放在两个金属块之间。
Everyone knows that the value of the dollar bill decreases each year, but there is actually a way of demonstrating a shrinking dollar. This demonstration can also be done with any other item made from paper, such as foreign currency, parking tickets, memos from your boss, or writing paper.Caution: The entire demonstration must be done in a hood. Wear goggles, protective gloves, and protective clothing. In the hood, fill a large Dewar flask or beaker halfway with liquid ammonia from an ammonia tank. (Ammonium hydroxide solution does not work.) Soak a dollar bill in the ammonia for a few seconds; then, using tongs, remove the dollar bill and allow the ammonia to evaporate from it in the hood. As the ammonia evaporates, the dollar bill shrinks. This process can be repeated several times to shrink the bill even more. To obtain an unwrinkled dollar bill, place the wet bill between two metal blocks and heat the blocks with a heat gun until the bill dries.We weighed the dollar bill before and after the process a...